fix issue that when RRCConnectionRelease happened by UL failure DL SCD doesn't send DCCH(RRCConnectionRelease) to UE because ul_out_of_sync is set to 1

reset release_timer from 200ms to 100ms because of flightmode on/off issue, reduce ul failure timer log

add remove ue info to freeList when RRCConnectionReestablish occurs and for ru_thread to remove the info

Summary of changes:
- heavy code cleanup (#ifdef removal)
- bugfixes

Merge remote-tracking branch 'origin/issue-285-connect-disconnect-multiple-time' into develop_integration_2018_w04

Conflicts:
	openair1/PHY/LTE_TRANSPORT/ulsch_decoding.c
	openair1/SCHED/defs.h
	openair2/LAYER2/PDCP_v10.1.0/pdcp.c
	openair2/RRC/LITE/rrc_eNB.c

As reported by Emad Alizade:

    According to "Issue255 256 257 paging reesta release" that has been
    merged in develop version, we have a question: In rrc_eNB_free_UE()
    function only all ulsch related memory of user has been cleaned, but
    I think not only ulsch memory but also dlsch memory must be cleaned.
    I tested the latest develop version and with repetition UE attach-detach
    procedures we find that the dlsch memory has not been cleaned and after
    repeat this sequence (45 times) assertion with cause UE_id!=-1 (no free
    or exiting dlsch_context, dci_tools.c: fill_dci_and_dlsch() ) occurred
    and no UE will be attached to system.

The fixes in this commit are from Emad Alizade.

Summary of changes:
- Implementation of paging (see issue #255 in gitlab)
- Implementation of RRC RE-ESTABLISHMENT (see issue #256 in gitlab)
- Implementation of RRC CONNECTION RELEASE (see issue #257 in gitlab)

Some modifications with timers have been done.
Expect (and report) problems, thanks.

What has been tested:
- monolithic eNB 5 and 10MHz with one commercial UE. UDP and TCP
  traffic, uplink and downlink, with iperf (with a third party
  EPC, not openair-cn). TCP downlink traffic is not stable.
  Reason yet unknown. Will be fixed later.

Conflicts:
	targets/RT/USER/lte-softmodem.c